Internal-combustion engine.



PATENTED JUNE 30, 1903.

A. P. 3mm INTERNAL COMBUSTION ENGINE.

APPLICATION FILED FEB. 24. 1903.

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No. 732.343. PATENTBD JUNE 30, 1903. v

A. F. EVANS.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED MB. 24. 1903.

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UNITED STATES Patented June 30, 1903.

PATENT OFFICE.

INTERNAL-COMBUSTION ENGINE.

SPECIFICATION forming part of Letters Patent N 0. 732,343, dated June 30, 1903. I Application filed February 24, 1903. Serial Iflo. 144,768. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR FREDERICK EVANS, engineer, a subject of the King of Great Britain, residing at 11 Brunswick Walk, Cambridge, England, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

The object of this invention is to construct a noiseless engine in which the valves do not jam and the hydrocarbon-supply is not affected by cold and in which there is no pos sibility of hydrocarbon entering the crankchamber and causing crank-chamber fire.

The drawings illustrate an engine madein accordance with this invention.

Figure 1 is a vertical section. Fig. 2 is a transverse section on the line 2 2, Fig. 1; and Fig. 3 is a transverse section on the line 3 3, Fig. 1.

The cylinder 0, is provided with a crankchamber 19 and inlet and exhaust ports 0 and d, respectively, the ports being closed by the piston e and the inlet-port 0 being in free communication with the crank-chamber. A pipe f, preferably terminating in a taper bore or nozzle, projects into the inlet-port c and leads to the bottom of a fuel-receiving chamber 9, preferably adjacent to the inlet-port, and cast in one piece with the cylinder. This chamber is in constant communication with Preferably the bottom of the chamber 9 is concave and is just below the level of the inlet-port;

Leading into the chamberg is a duct h,

' communicating with the fuel-supply. In this duct is a screw-plug i and a ball-valve j for regulating the flow of hydrocarbon and also acting as a non-return valve, which closes when there is any pressure in the chamber g.

In the crank-chamber b is a valve is for the admission of air, which consists of a perforated plate Z, with a disk m, of india-rubber, secured to the plate at the center.

The ignition may be on any system, but I prefer the timed low-tension spark.

The cylinder-head n is shown as being concave on the inside, and it is surrounded bya hood 0.

The operation of the engine is as follows: On the upstroke of the piston (I refer to a vertical engine) a partial vacuum is formed in the crank-chamber b and air enters it.

The vacuum is communicated to the hydrocarbon-chamber g. Consequently the ballvalvej is lifted and a certain quantity of hydrocarbon is drawn into the chamber, the quantity being regulated by means of the plug 2'. On the end of the upstroke the disk min the crank-chamber closes the perforations in the plate Z, and on the descent of the piston the air is compressed, so that at the end of the stroke the air in the crank-charm ber and the air in the hydrocarbon-chamber g is under compression and the proper charge is collected at the bottom of the chamber g. First the exhaust-port d and then the inletport 0 arebpened at the end of the stroke and the air in the crank-chamber expands into the cylinder at, first scavenging the remainder of the previously-burned charge and then carrying with it the new charge, which has been carried up by the air expanding out of the chamber 9, spraying it at the entrance of the port. The charge is deflected upward in the usual manner by a projection 19 on the piston e, vaporizing as it goes, and is then compressed in the cylinder and fired.

The engine is preferably regulated by a valve in the crank-chamber, which can be opened and closed at will. This valve may conveniently consist of openings q in the wall of the chamber 19, and a plate 7, pivoted at s-above them. A handle 25 is provided at the side for turning the plate r. By more or less destroying the partial vacuum and compression in the chambers to andg the amount of air and hydrocarbon that enters the cylinder is regulated. 7

What I claim is- 1. In an internal-combustion engine, the combination of a working cylinder provided with admission and exhaust ports, a piston working in said cylinder, an air-compressing chamber intermittently put into communication with the working cylinder as the piston reciprocates, a fuel-receiving chamber in constant communication with the air-chamber and intermittently connected with the working chamber as the piston reciprocates, and a fuel-supply passage leading to the fuel-receiving chamber, the organization being such that as the piston reciprocates fuel is sucked into the fuel-receiving chamber, then air is compressed therein, and then the fuel and air pass from the fuel-chamber with air from the compressed-air chamber to the cylinder.

2. In an internal-combustion engine, the combination of a working cylinder, a crankchamber,'a piston reciprocating in the cylinder, a passage leading from the crank-chamher to the cylinder, an inlet-port at the end of the passage adapted to be opened and closed by the piston, a fuel-receiving chamber communicating with the crank-chamber, a pipefterminatingattheinlet-port andleading into the fuel-receiving chamber and permanently communicating with the crank-chamber, an outlet-port adapted to be opened and closed by the piston, and a fuel-supply passage leading to the fuel-receiving chamber.

3. In an internal-combustion engine, the combination of. a Working cylinder, a crankchamber, a piston reciprocating in the cylinder, a passage leading from the crank-chamber to the cylinder, an inlet-port at the end of the passage adapted to be opened and closed by the piston, a fuel-receiving chamber communicating with the crank-chamber, a pipef terminating at the inlet-port and leading to near the bottom of the fuel-chamber,

an outlet port adapted to be opened and closed by the piston, and a fuel-supply passage leading to the fuel-receiving chamber.

4. In an internal-combustion engine, the

combination of a working cylinder provided with admission and exhaust ports, a piston working in said cylinder, a crank-chamber intermittently put into communication with the cylinder as the piston reeiproeates, an automatic inwardly-opening valve for admitting air to the crank-chamber, a regulatingvalve in the crank-chamber, a fuel-receiving chamber in constant communication with the crank-chamber and intermittently connected with the Working cylinder as the piston reciprocates, and a fuel-supply passage leading to the fuel-receiving chamber, the organization being such that as the piston reciprocates fuel is sucked into the fuel-receiving chamber, then air is compressed therein, and then the fuel and air pass from the fuel-chamber with air from the compressed-air chamber to the cylinder.

ARTHUR FREDERICK EVANS.

Witnesses:

VVILFRED CARPMAEL, '1. J. OSMAN. 

